Applicable Systems
MoviDrive
Symptoms
Communication fault. The fieldbus communication between the drive and the master controller has beeninterrupted. The drive enters its configured bus fault response mode.
Possible Causes
- Fieldbus cable disconnected or damaged
- Fieldbus termination resistor missing or incorrect
- Master controller stopped communicating or crashed
- Fieldbus node address conflict or incorrect configuration
- Electromagnetic interference on the fieldbus cable
Troubleshooting Steps
- Step 1: Check the equipment status and fault indicators to confirm the active fault code
Fault indicator or HMI displays code F36 as active - Step 2: Verify all electrical connections, wiring harnesses, and connector seating
All connections secure, no corrosion, loose pins, or damaged wires - Step 3: Check the communication cable continuity and connector seating at both ends
Cable continuity confirmed, connectors fully seated with locking tabs engaged - Step 4: Verify communication parameters (baud rate, node address, protocol) match network configuration
All communication parameters match the network setup - Step 5: Inspect cable for EMI interference: check routing away from high-voltage lines and motor cables
Cable routed away from EMI sources, shielding intact - Step 6: Check terminating resistors at bus endpoints if applicable (e.g., PROFIBUS, CANopen)
Terminating resistors installed at both bus ends - Step 7: Reset the fault after restoring communication: power-cycle the affected node
Communication restores and fault clears
How to Reset
To reset: 1) Fix the communication cable or parameter issue. 2) Power-cycle the affected node. 3) Verify communication restores. Caution: Check all nodes on the bus.
Frequently Asked Questions
- Q: What does fault code F36 mean on the SEW Eurodrive MoviDrive?
Fault F36 indicates a communication fault. The equipment has lost communication with a connected device or network. Check the communication cables, connectors, and network parameters.
- Q: Can I continue operating the equipment with fault F36 active?
No. The equipment has detected a fault condition and has taken protective action (typically stopping or derating). Continuing to operate without fixing the root cause may cause further damage. Always investigate and fix the fault before resuming operation.
Source: SEW Eurodrive MoviDrive MDX61A Operating Instructions, SEW-Eurodrive Documentation
Category: PLC & VFD